I do know that multo emphasises pulchriorem and I believe that the sentence translates something like:

I am going to a much more beautiful land, to my own country, Greece!

My question is that the ablative 'multo' would seem to be masculine and 'pulchriorem' I take it is accusative feminine to agree with 'terram'. Is it the case, therefore, that the ablative 'multo' doesn't vary but is a phrase that doesn't agree in gender with anything but stands on its own? Is it a sort of ablative absolutely absolute - as it were..?